Cartridge coupler



FIG. 1 is a perspective view of a cartridge coupler in a closed position showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is another perspective view thereof;

FIG. 9 is another front view thereof;

FIG. 10 is another rear view thereof;

FIG. 11 is another right side view thereof;

FIG. 12 is another left side view thereof;

FIG. 13 is another top view thereof; and,

FIG. 14 is another bottom view thereof.

The broken lines illustrate the environment of the cartridge coupler and form no part of the claimed design. 

CLAIM The ornamental design for a cartridge coupler, as shown and described. 